ASoC: Intel: Skylake: Add helper function to setup host/link dma

This patch adds helper function to configure the host/link DMA when
the DMA is in decoupled mode.
Next patch adds the usage of this helper routines for configuring
DMA in Mixer event handler.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index aebae234152c451c91362e4b5d6eed6f7d831d77..1abff8e1a29877486c06bc9ccf3862bb9bc69dc1 100644 (file)
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -137,6 +137,80 @@ static void skl_set_suspend_active(struct snd_pcm_substream *substream,
                skl->supend_active--;
 }
 
+int skl_pcm_host_dma_prepare(struct device *dev, struct skl_pipe_params *params)
+{
+       struct hdac_ext_bus *ebus = dev_get_drvdata(dev);
+       struct hdac_bus *bus = ebus_to_hbus(ebus);
+       unsigned int format_val;
+       struct hdac_stream *hstream;
+       struct hdac_ext_stream *stream;
+       int err;
+
+       hstream = snd_hdac_get_stream(bus, params->stream,
+                                       params->host_dma_id + 1);
+       if (!hstream)
+               return -EINVAL;
+
+       stream = stream_to_hdac_ext_stream(hstream);
+       snd_hdac_ext_stream_decouple(ebus, stream, true);
+
+       format_val = snd_hdac_calc_stream_format(params->s_freq,
+                               params->ch, params->format, 32, 0);
+
+       dev_dbg(dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
+               format_val, params->s_freq, params->ch, params->format);
+
+       snd_hdac_stream_reset(hdac_stream(stream));
+       err = snd_hdac_stream_set_params(hdac_stream(stream), format_val);
+       if (err < 0)
+               return err;
+
+       err = snd_hdac_stream_setup(hdac_stream(stream));
+       if (err < 0)
+               return err;
+
+       hdac_stream(stream)->prepared = 1;
+
+       return 0;
+}
+
+int skl_pcm_link_dma_prepare(struct device *dev, struct skl_pipe_params *params)
+{
+       struct hdac_ext_bus *ebus = dev_get_drvdata(dev);
+       struct hdac_bus *bus = ebus_to_hbus(ebus);
+       unsigned int format_val;
+       struct hdac_stream *hstream;
+       struct hdac_ext_stream *stream;
+       struct hdac_ext_link *link;
+
+       hstream = snd_hdac_get_stream(bus, params->stream,
+                                       params->link_dma_id + 1);
+       if (!hstream)
+               return -EINVAL;
+
+       stream = stream_to_hdac_ext_stream(hstream);
+       snd_hdac_ext_stream_decouple(ebus, stream, true);
+       format_val = snd_hdac_calc_stream_format(params->s_freq,
+                               params->ch, params->format, 24, 0);
+
+       dev_dbg(dev, "format_val=%d, rate=%d, ch=%d, format=%d\n",
+               format_val, params->s_freq, params->ch, params->format);
+
+       snd_hdac_ext_link_stream_reset(stream);
+
+       snd_hdac_ext_link_stream_setup(stream, format_val);
+
+       list_for_each_entry(link, &ebus->hlink_list, list) {
+               if (link->index == params->link_index)
+                       snd_hdac_ext_link_set_stream_id(link,
+                                       hstream->stream_tag);
+       }
+
+       stream->link_prepared = 1;
+
+       return 0;
+}
+
 static int skl_pcm_open(struct snd_pcm_substream *substream,
                struct snd_soc_dai *dai)
 {

diff --git a/sound/soc/intel/skylake/skl-topology.h b/sound/soc/intel/skylake/skl-topology.h
index 405765f3a6b5b30058f7b5fa822b6cb349c15477..a0d3158196f007e5b750e428e90fcff53fcdfd01 100644 (file)
--- a/sound/soc/intel/skylake/skl-topology.h
+++ b/sound/soc/intel/skylake/skl-topology.h
@@ -385,4 +385,8 @@ int skl_get_module_params(struct skl_sst *ctx, u32 *params, int size,
 struct skl_module_cfg *skl_tplg_be_get_cpr_module(struct snd_soc_dai *dai,
                                                                int stream);
 enum skl_bitdepth skl_get_bit_depth(int params);
+int skl_pcm_host_dma_prepare(struct device *dev,
+                       struct skl_pipe_params *params);
+int skl_pcm_link_dma_prepare(struct device *dev,
+                       struct skl_pipe_params *params);
 #endif